Paul F Lindlau

US Patent:

46821538, Jul 21, 1987

Filed:

Oct 23, 1985

Appl. No.:

6/790445

Inventors:

James M. Boozer - Hampton NJ
Robert W. Mayer - Hackettstown NJ
Alan J. Kumasaka - Hackettstown NJ
Paul R. Strelecki - Metuchen NJ
Paul F. Lindlau - Long Valley NJ

Assignee:

Amerace Corporation - Hackettstown NJ

International Classification:

G08B 2900
G08B 100
G08G 114

US Classification:

340507

Abstract:

A fail-safe sensor system to provide a positive indication of the proper operation of a sensor system by accounting for the return signals from an active zone and a monitor zone beyond. Search signals, provided by a transducer operating in the transmit mode, are transmitted within an active zone within which objects to be detected are expected to be located. Unreturned search signals are permitted to travel beyond the active zone into a monitor zone beyond and objects in such monitor zone cause return signals which are also employed. A counter feed from a free running clock source is permitted to run up a count whose predetermined limit represents the estimated maximum time period during which a sensor system should operate without contacting an object. Return signals, whether from objects in the active zone or the monitor zone, reset the counter back to zero. The absence of a return signal permits the counter to exceed its predetermined limit and produce an output signal which can be directed to control circuitry, an alarm or logic circuitry to determine if the system is operative.

US Patent:

41022866, Jul 25, 1978

Filed:

May 20, 1977

Appl. No.:

5/798898

Inventors:

Glenn W. Johnson - Summit NJ
Paul F. Lindlau - East Orange NJ

Assignee:

Amerace Corporation - New York NY

International Classification:

B21D 5300

US Classification:

113119

Abstract:

Connectors having strip member contact elements wherein louvers or contact fingers extend in dissimilar extents from opposed sides of the strip member. Method is also disclosed for enhancing contact surface area between the extremities of contact fingers and complementary contact surfaces.

US Patent:

40392384, Aug 2, 1977

Filed:

May 5, 1976

Appl. No.:

5/683527

Inventors:

Glenn W. Johnson - Summit NJ
Paul F. Lindlau - East Orange NJ

Assignee:

Amerace Corporation - New York NY

International Classification:

H01R 1312
H01R 1320

US Classification:

339 95R

Abstract:

Connectors having strip member contact elements wherein louvers or contact fingers extend in dissimilar extents from opposed sides of the strip member. Method is also disclosed for enhancing contact surface area between the extremities of contact fingers and complementary contact surfaces.